Secondary electron spectra of semi-crystalline polymers – A novel polymer characterisation tool?

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Title: Secondary electron spectra of semi-crystalline polymers – A novel polymer characterisation tool?
Authors: Dapor, Maurizio | Masters, Robert C. | Ross, Ian | Lidzey, David G. | Pearson, Andrew | Abril, Isabel | García Molina, Rafael | Sharp, Jo | Unčovský, Marek | Vystavel, Tomas | Mika, Filip | Rodenburg, Cornelia
Research Group/s: Interacción de Partículas Cargadas con la Materia
Center, Department or Service: Universidad de Alicante. Departamento de Física Aplicada
Keywords: Secondary electron spectra | Semi-crystalline polymers | Polymer characterisation tool
Knowledge Area: Física Aplicada
Issue Date: Jan-2018
Publisher: Elsevier
Citation: Journal of Electron Spectroscopy and Related Phenomena. 2018, 222: 95-105. doi:10.1016/j.elspec.2017.08.001
Abstract: The nano-scale dispersion of ordered/disordered phases in semi-crystalline polymers can strongly influence their performance e.g. in terms of mechanical properties and/or electronic properties. However, to reveal the latter in scanning electron microscopy (SEM) often requires invasive sample preparation (etching of amorphous phase), because SEM usually exploits topographical contrast or yield differences between different materials. However, for pure carbon materials the secondary spectra were shown to differ substantially with increased order/disorder. The aims here is to gain an understanding of the shape of secondary electron spectrum (SES) of a widely used semi-crystalline polymer regioregular poly(3-hexylthiophene-2,5-diyl), commonly known as P3HT, and its links to the underlying secondary electron emission mechanisms so SES can be exploited for the mapping the nano-morphology. The comparison of simulated and experimental SES shows an excellent agreement, revealing a peak (at about 0.8 eV) followed by a broad shoulder (between 2 eV and 4.5 eV) with respective relative intensities reflecting order/disorder.
Sponsor: MD acknowledges the support of the The LeverhulmeTrust through the Visiting Professorship (VP1-2014-011) that made this project possible. IA and RGM thank partial financial support by the Spanish Ministerio de Economía y Competitividad (Project FIS2014-58849-P) and the Fundación Séneca – Murcia Regional Agency of Science and Technology (project 19907/GERM/15). CR thanks EPSRC for funding under grant EP/N008065/1.
ISSN: 0368-2048 (Print) | 1873-2526 (Online)
DOI: 10.1016/j.elspec.2017.08.001
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2017 Elsevier B.V.
Peer Review: si
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Appears in Collections:INV - IPCM - Artículos de Revistas

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